code coverage

README

See the question: http://stackoverflow.com/questions/7319204/code-coverage-which-run-covers-which-code

coverage.sh

#!/bin/bash

gcov -d *.c
lcov -d . -z
./primes 0
./primes 1
./primes
lcov -d . --capture --output-file primes.info
mkdir report
genhtml -o report primes.info

main.c

/**
 * initially I intended to make this more involved,
 * that's why it's called "primes". I've reduced the
 * POC, it has nothing to do with prime numbers, and
 * I'm lazy
 */
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char* argv[]) {
    int n;
    if(argc == 1) {
        return EXIT_FAILURE;
    }
    n = atoi(argv[1]);
    if(n == 0) {
        return EXIT_SUCCESS;
    }
    else {
        return n;
    }
}

Makefile

CC=gcc
CFLAGS=-Wall -g3 -O0 -fprofile-arcs -ftest-coverage
OBJ_FILES=main.o

primes: $(OBJ_FILES)
	$(CC) $(CFLAGS) -o $@ $?

main.o: main.c
	$(CC) $(CFLAGS) -o $@ -c $?

clean:
	rm -rf *.o primes
	rm -rf *.gcno *.gcda *.gcov
	rm -rf primes.info
	rm -rf report